[KeepTheFeather]

Where did you order the exhaust from? I've been looking for the same thing for awhile, quite like the look of yours. Also any chance you could post a video of how it sounds in high and low rpms?

-KTF

 

[KeepTheFeather]

Oh did that need welding?

 

[KeepTheFeather]

Oh wow I didn't know there was such a thing, so cheap as well! Do I need to dyno the bike with this exhaust? Would there be any issues from not doing a remap and running them?

Edit: I understand I wouldn't get the full HP benefit If I didn't retune, but are there any negative impacts to the engine/bike from just keeping the ECU as is? Don't feel like buying a 400eur power commander for a 50 eur exhaust lol

 

[KeepTheFeather]

Thanks for the answer.
Yeah our OEM exhaust is VERY quiet. Too quiet ... main reason for wanting a slip-on.
Also the size is a bit annoying for maintenance.

Also there's the expensive part. The exhaust guard costs 60 eur, it actually protects the exhaust and the bike very well (I have crashed on that side) but its expensive to replace.

 

[KeepTheFeather]

That's true about the heat shield, the exhaust guard never gets overly hot and I never burned myself on it.

Iv'e thought a lot about sliders for a long time without reaching a good conclusion.

I think the problem with most frame sliders is they don't really slide because they are either too pointy or too weak to endure/disperse energy so they just bent and pierce into the plastics instead, perhaps only useful during stationary ''drops'' instead of crashes.

.And If they are strong but pointy they result in all the energy being focused on the frame which, like Cahuna said, could be a nail in the coffin.
The strong but pointy ones have a positive if you look at certain brands, like SHOGUN or R&G for example use a sortoff '' soft rubber material''. The material is eaten away during the crash dispersing energy, they also use strong metal bases so you can expect them to not bend or focus energy as violently. (

) good example video.

Problem is... last I checked SHOGUN and good quality sliders cost 350eur, for that amount you might as well buy new plastics... (also most on our bikers require drilling holes into the plastics) AND they are a one time deal, you crash with them at speed and you have to replace them.

OEM plastics are very strong, and at the end of the day are the perfect sliders... it's just a shame they are so **** expensive and without sliders no matter the speed of the crash they will get scratches and ruin our bikes look.

Iv'e heard of people buying chinese aftermarket fairings, they ride with them effectively using them as sliders and keeping the OEM safe and sound at home. It's a good idea except chinese fairings are very brittle, so allthough cheap they wouldn't do a good job as sliders.

Honda CBR 250R 2011-2015 RD Moto Crash Frame Sliders SL01 Black 7 Colors | eBay

Find many great new & used options and get the best deals for Honda CBR 250R 2011-2015 RD Moto Crash Frame Sliders SL01 Black 7 Colors at the best online prices at eBay! Free shipping for many products!

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^This design is interesting, looks more ''sliding'' friendly, but if its not strong, I can see it bending inwards into the fairings and causing some damage :/

So iv'e crashed on both sides of my bike without sliders, at fairly decent speeds. and both times damage was focused on the plastics, the bar-end weights, exhaust guard, passenger footpegs and gear shifter. passenger footpegs still look fine, gearshift had to be fixed, but replacement wise is say it all falls to the plastics, exhaust guards and bar end weights. All pretty much equal to the price of high quality sliders. (maybe a tad bit more expensive). So I dont think its really worth having sliders on this particular bike.

 

[KeepTheFeather]

Also if you search Ebay and what not, they do sell cheap exhaust guards/heat shields. Motorcycle Exhaust Heat Shield Protector Black Universal Motorbike Guard Cover | eBay
like these for example. Theres many designs, the only problem is I assume during a crash because they use bands they might just fly out the exhaust :/

Oem guard uses hooks, so even at high speed, that bad boy is staying put.

 

[KeepTheFeather]

Your complete explanation is really convincing. I think like you, and I know from experience that the original design guard the motorcycle in the most reasonable way. The weights at the end of the handlebars are sliders that Honda provides for free (build-in) as a part of all the design. My CBR motorcycle was skidded by the previous owners, and there are slight damage to the paint, on the central main cover, on the front wheel mudguard, and on the heat shield of the exhaust. The rear brake lever is also a little bended, and I bended back into place...small and tolerable defects.

Yeah the tip of my gear shifter was bent inwards, a mechanic tried bending it back out and broke it but welded it back into place for free!
The bike seems pretty crash friendly tbh. On both my crashes the front fairings were the only ones broken. The big side fairing was just scratched. They aren't cheap to replace but not the end of the world. Ive been looking for some used fairings for awhile with no luck. I think this bike is very rare where I live.

The handle bar ends are VERY strong. So strong that on one of my crashes the screw bent outwards with just some scratches to the bar end. You can buy lightweight bar ends as well. I found they make stability at high speeds a little worse but make it easier to turn the handlebars.

 

[KeepTheFeather]

@bigcahuna would it be possible for you to post that video of the exhaust sound?

 

[KeepTheFeather]

Also does anyone know what the diameter of the inner end of the middle exhaust link is in mm?

 

[KeepTheFeather]

Thank you!, In that case would a cbr300r mid pipe fit?

Like this one:

DIMENSIONS:

Is 42mm too wide?

 

[KeepTheFeather]

The gasket used is the same for both cbr250r and cbr300r, but the PIPE,EX of course isn't. But i'm assuming since the exhaust goes over the gasket does it really matter?

 

[KeepTheFeather]

Pardon my stubbornness, but why does it not fit? Isn't the mid pipe supposed to go over the gasket?

I saw that comment, I also found this one with a good review:

https://pt.aliexpress.com/item/1005...00016207282252!sea&curPageLogUid=tQrJEsnYheJH

 

[KeepTheFeather]

The reason i'm asking is because I wanted the blue finish on the mid pipe but I haven't found any with that finish for our bike

 

[KeepTheFeather]

Thanks for the video!

95% of the time Aliexpress is cheaper than Ebay, however I have found better deals on ebay sometimes like for a tail tidy.

Ebay also refunds quicker and a bit more consistently than Aliexpress and items tend to arrive a bit earlier than Ali.

With that being said, I feel a lot of chinese sellers are shifting over to Aliexpress, and sometimes you will find things on there that aren't even on Ebay.
And sometimes price can be significantly better.

 

[KeepTheFeather]

That's good to know. I was more wondering why the CBR300R mid pipe I linked wouldn't fit.

 

[KeepTheFeather]

So correct me if I'm wrong but with an OD of 38mm + gasket with OD of 44mm, putting a "normal" cbr250r mid pipe with an ID of 40mm would mean it would crush the gasket 4mm.

The CBR300r mid pipe has 42 ID meaning it would crush 2mm instead of 4mm creating a "looser sealing" correct? Would this even be an issue?

Also @BigCahuna what did you use as sealant on the gasket? I saw some people use silicone sealant?

 

[KeepTheFeather]

Oh I see, perphaps a gasket from a smaller bike would do the trick, 50cc or 125cc gasket? As long as ID is 38. Ill look around.
So having a 40mm mid pipe on a 38 OD inner pipe doesn't cause a leak? Im surprised. Im guessing for a cbr300r its probably safer to actually find a gasket

 

[KeepTheFeather]

Thank you for all the feeback.

I suppose in that case the ID for the OEM exhaust must be bigger if these mid pipes don't fit with the original gasket.

Yeah I agree with you for the purpose of the gasket and that's the reason why Ideally I'd want to put the mid pipe with a gasket in between. Since with either one there will be a 2mm-4mm clearance that "should" ideally be sealed.
Edit: 2mm is actually not that bad but in case of a cbr300r mid pipe 4mm might be...


I just saw a video where a branded manufacturer included a silicone sealant, and wasn't sure if it was 100% needed. But I suppose maybe not then.

3:12 time stamp

 

[KeepTheFeather]

Ok, in that case ideally Id need a 38 ID 42 OD gasket and BigCahuna a 38 ID 40 OD gasket.

 

[KeepTheFeather]

Well I'm assuming the 42mm is ID, but it could very well be OD since they don't specify